Quipus

Quipus or khipus were recording devices used in the Inca Empire and its predecessor societies in the Andean region. Khipu is the word for "knot" in Cusco Quechua, the native Inca language.

Mind Map

A mind map is a diagram used to represent words, ideas, tasks, or other items linked to and arranged around a central key word or idea.

The mind map above is based on Khipu Database Project by Gary Urton and Carrie Brezine as of July 2003.